I have two bicycles, ____ is made in Guangzhou;____ is made in Shanghai.

I'm expecting a pet dog for long，but mom has no time to buy _________ for me．

_____ is our belief that improvements in health care will lead to a stronger and more prosperous economy.

.Among all the problems,_______is so difficult as this one. 

 They want to make _______ clear to the public that they are doing an important and necessary job.